Attachment for boats



July 6, 1926.

ZSheets-Shet 1 l u W F. C. DIECKMANN ATTACHMENT FORl BOATS Filed August22' w N H W Iuly 6 i926.

F. c. DIECKMANN ATTACHMENT FOR BOATS Filed August 22, 1924 2Sheets-Sheet 2 www@ INVENTOR ATTORNEYS Patented July 6, 1926.

ostras A stares Fries.

4einem; cni'asrorrinn BIECKMANN, on GINCINN'ATI, or'rio.

Armeni/mum ron roars.

vfApplicatirl filed August V22, 1924. Serial No.` 733,621.

My invention is a' device attachable to" the'hull of a boat andaffording facilitiesv an attachment of the character described which isadaptedl to dischargel rapidly whirl-` ing currents of water rearwardlyalong` the sides` of the hull of a boat to' which -theddevice isattached forl the purpose of deflecti-ng outwardly from the sides ofthehull of lthe boat water which otherwise would im'- pinge withrelatively great force against the hull of the boat.

A further object of the invention is the provision of a device of thecharacter described which includes a unit atta'chable to the prow of theboat and extending below the water line for defleetingl the water out'-wardly from the Vsides of the hull of the boat as the boat movesforward' so that but relatively little resistance will be opposed to theforward movement of the boat through the water.

A further object of the invention'is the provision in a device of thecharacter described of anovel nozzle for discharging a rapidly whirlingstream of water rearwardlyl along the side of the hull of the boat.

Other objects and advantages will be apparent from the followingdescription, considered in conjunction' with the accompany- 'Y ing'drawings, in which :Figure l is" a side elevationV of the forwardportion ofthe hull of a boat equipped with a practical' embodimei'it ofthe invention Figure 2 is a section along the line 2 2 of Figure 1,( Y

Figure 3 is a longitudinal vertical section through one of the noZ'zleswhich are comprised in the device,

Figure 4 is a section along the line 4 4 ofY Figure *8,

4Figure 5 is a sectionI along the line 5 5 of Figure 3.

' In Figures l andl 2, the forward portion Y 'of the hull of a boatdesignated l is shown. An attachment embodying the invention comprises afront protecting unit 2 and a pairy of lateral protecting units 3.

The front unit 2 comprises a' casing which is substantially V-shaped incross section and comprises a pair of side members 4 which are bentslightly forward adjacent to their juncture with each otherl and aremerged or joined together to provide a relatively sharp vertical edge 5which is serrated or notched from its lowerpend nearlyV to the upper endthereof as clearly shown in Figure lf. rilhe sides 4 are provided attheir' lower ends with inwardlyextendin'g flanges 6 of uniform widthwhich are merged one into the other in the vertical plane of thejuncture of the sides 4 of the outer casing of the front unit. The sides4 also are provided at their rearward ends with inwardly' extendingflanges 7 of approximately the same width as the flanges 6; The flanges7 are merged at their lower ends into' the bottom flanges 6 and areformed with laterally turned attaching portions 8 at their inner'edges.l The casing of the front unitis positioned at the prow of a boatwith the respective flanges 6 in straddling relation tothe prow offmtheboat hull and in abutting relation'to the forward portion of the sidesof the boat hull and with the att-aching portions 8` of the flanges 7flatwise against the opposite sides of the boat hull and secured to thelatter byl any suitable known fastening means,- none being shown in thedrawings. With the arrangement just described,vr the respective sides 4of the casing ofthe front unit will' be positioned in spaced parallelrelation to the forward portions of the corresponding sides of the boathull and the line of juncture of the sides 4 with each other will belocated in advance of the line ofjuncture'of the sides of the boat hulland inthe longitudinal anis ofthe boat. It also will be understood thatthe casing of-Vthe front unit is attached to the boat hullso that themajor portionv of the casing will be belowwthe water line, indicated at9 in? Fig'. l. The casing of the front unit may be stayed? to the boathull by a substantially U-shaped brace member 10 which has the webyportion thereof securednto the sidesA 4 adjacent to their juncture witheach other and has the arms thereof secured to the sides of thel boathull at the prow of the boat.

TheV spacebetween` the sides 4 of the casing and the boat hull isdivided by' a pair of vertical partitions l1 into a front compartment,indicated at 12 and a4 pair of lateral compartments. Each of the lateralcompartment's is divide-d by a horz'ontalf partition 13 into an upperchamber 14 and a lower chamber 15. Each ofthe sides14 is provided belowthe water line 9 with apertures 16 which open into the front compartment12. intake tubes 1T lead from the upper part of compartment 12 to a pumpwhich is shown diagrammatically at 18. Discharge tubes 19 lead from thepump 18 to the chambers 1st. Delivery tubes 2O are in open communicationat their upper ends with the interior of the chambers 1-l and extendthrough the chan'iliers 15 to nozzles Q1 which are carried by theflanges "i in vertically spaced relation below the water line 9 andextend rearwardly along the sides of the hull of the boat. The deliverytubes 2O therefore are of different lengths, since there is a deliverytube 2O for each nozzle Q1 and the length of the delivery tube of coursewill vary according to the position of the nozzle 21 to which it isconnecter in the vertical series. there being a vertical series ofnozzles Q1 et each side of the hull of the boat.

Each of the nozzles 21 tapers externally toward its rearward end and therespective nozzles 21 differ from one another only in that the size ofthe nozzles increase regularly in size from the uppermost to thelowermost nozzle of the series. Each nozzle 21 is provided with alongitudinal passage extending therethrough, this passage being formedof two spiral bores indicated at 22 and 23 respectively which extendthrough the nozzle in longitudinally intersecting relation, each of thebores 22 decreasing regularly in cross sectional area from the inner endof the nozzle to the outer end thereof.

The operation of the front unit is substantially as follows: Waterenters the intake compartment 12 through the apertures 16 and is drawnthrough the intake pipes 17 to the pump 18. Thence, the water isdischarged within the delivery chamber let and through the deliverypipes 2O into and through the nozzles 21. Since the passages 92-23 ofthe nozzlespdecrease in cross sectional area toward their outer orrearward ends andeaeh of the passages is formed of two longitudinallyintersecting spiral bores, it will be manifest that streams of waterwill be discharged from the nozzles at high velocity and in whirling ortwisting form. These whirling streams of water will move rearwardlyalong the sides of the boat hull and will deflect water which wouldotherwise impinge against the sides of the boat hull outward from theboat hull, thus reducing friction beyond the ordinary and also reducingthe resistance which is opposed to the forward movement of the boat inthe water.

Each of the side units 3 comprises a casing including a side plate whichconsists of two angularly related portions and 31 respectively. rl`heside plate has a bottom flange 32, a rear flange 33 and a top flange 34,

whereby it may be attached to one of the sides of the boat hull so thatthe portion 31 of the side plate will be disposed in substantiallyparallel relation to the adjacent side of the boat hull and the portion30 of the side plate will extend inwardly and forwardly from itsjuncture with the portion 31 to the plane of the adjacent side of theboat hull. The space between the side plate 30-31 and the adjacent wallof the boat hull is divided by a vertical partition 35 into a forwardcompartment 36 and a rearward compartment, the rearward compartmentbeing divided by a horizontal partition 3T into an upper compartment 38and a lower coinpartment 39. The side of the forward conipartment 36 isthe portion 30 of the side plate and it is provided with apertures 4()located below the water line. The rear flange 33 carries a verticalseries of the noz- Zles 21 and delivery tubes Q0 extend from the nozzles21 to the upper rearward compartment 38. It will be understood that theupper compartment 3S may be connected in any suitable known manner tothe delivery side of a pump and the compartment 30 is connected to theintake side of the pump, neither the pump nor the intake and dischargetubes thereof being shown in the drawings in association with the sideunits 3.

The operation of each side unit 3 is identi cal in essential respectswith the operation of the front unit 2.

lf claim z- 1. device of the character ('lescribed comprisinga casing`intachable to the hull of :i boat in position to extend below the waterlevel. a plurality of nozzles carried by l casing, said nozzlesextending rear- 'mlly alongside of the boat hull and being' adapted forconnection with a source of fluid supply.

A device of the character described comprising a casing altachable tothe hull of a boat in position to extend below the water level, aplurality of nozzles carried by said casing, said nozzles being arrangedin a vertical series below the water level and extending rezrrwardlyalong a side of a boat hull.

21A device of the character described comprising a casing attachable tothe hull of a boat in position to extend below the water level, aplurality of nozzles carried by raid casing, said nozzles being arrangedin a vertical series below the water level aud extending rearwardlyalong a side of a boat hull, cach of said nozzles having alongitudinally extending passage tapering in cross sectional area towardits rearward end, each of said passages being formed of two spiral coresextending through the body of the nozzle in longitudinally intersectingrelation.

a. A device of the character described i comprising a casing attachableto the hull of a boat in position to extend below the water level, aplurality of nozzles carried by said casing, said nozzles being arrangedin a vertical series below the water level and extending rearwardlyalong a side of a boat hull, each of said nozzles having alongitudinally extending passage tapering in cross sectional area towardits rearward end, said nozzles decreasing in size regularl y from thelowermost nozzle to the uppermost nozzle of the series. r

5. ln a device ofl the character described, a nozzle comprising anelongated body having a longitudinally extending passage, said passagebeing formed of' two longitudinally extending spiral bores extendingthrough the body inlongitudinally intersecting rela tion.

6. A device of the character described comprising a casing attachable tothe prow of a boat to extend beneath the water line and having a pair ofside flanges eX- tending from the line of juncture of the sides of theboat rearwardly along said sides, the side members of the casing beingprolonged forwardly of the prow of the boat at the juncture of said sidemembers terminating in a substantially vertical edge, said edge beingserrated, and a vertical series of vertically extending spaced apartnozzles carried by each of said side members of the casing and adaptedfor connection with a source of pressure fluid supply, the side membersof said casing having marginal inwardly extending flanges adapted toabut the sides of the boat hull and space said side members from thesides of the boat hull, a vertical partition arranged between the sidemembers and the sides of the boat,

thus dividing the space between each side member of the casing and thehull of the boat into a front compartment and a rear compartment, ahorizontal partition dividing said rear compartment into an uppercompartment and a lower compartment, sald front compartment having'ports there-V through located beneath the water line and being adaptedat its upper end for connection with the intake side of a pump, theuppermost of said rear compartments being adapted for connection withthe discharge side'of the pump, and tubes extending from the uppermostof the rear compartments to said nozzles.

7. In a device of the character described, a unit comprising a casinghaving a side plate attachable to the side of a boat hull and dividedvertically into two angularly related portions, one of said portionsbeing parallel with the side of the boat hull and the other of saidportions being inclined from its juncture with the front portion to theplane of the side of the boat hull, said second portion of the sideplate having apertures therethrough located beneath the water line, ahorizontal partition disposed between the first portion of the sideplate and the hull of the boat, a vertical partition cooperating withsaid horizontal partition, said side plate and the hull of the boat toprovide a compartment between the upper part of the first named portionof the plate and the hull, a series of nozzles carried by a verticalflange at the rearward end of the first named portion of the sidemembers, and tubes extending between said side plate of the casing andthe boat hull for connecting said nozzles to the said compartment.

FRANK CHRISTOPHER DIECKMANN.

